Update README.md

Author: justinwoo

README.md

@@ -13,6 +13,10 @@ This library requires version 0.10 of the PureScript compiler, or later.
 bower install purescript-generics-rep
 ```
 
+## Examples
+
+You can find an example of how Generics-Rep are applied in [this tutorial](https://purescript-simple-json.readthedocs.io/en/latest/generics-rep.html) of the Simple-JSON docs.
+
 ## Documentation
 
 Module documentation is [published on Pursuit](http://pursuit.purescript.org/packages/purescript-generics-rep).